Drop fillRule state from GraphicsContext

Drop fillRule state from GraphicsContext

There was only a few trivial (local) uses of this state field left. Since
the same state is carried in the Path (SkPath) object itself, make use of
that instead.

BUG=424655
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196340

[fs, 2015-06-02 16:23:58]

fs@opera.com changed reviewers:
+ fmalita@chromium.org

[f(malita), 2015-06-02 17:20:26]

The CQ bit was checked by fmalita@chromium.org

[f(malita), 2015-06-02 17:20:26]

lgtm

[commit-bot: I haz the power, 2015-06-02 17:21:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1147343003/20001

[commit-bot: I haz the power, 2015-06-02 18:35:52]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-02 18:35:53]

Try jobs failed on following builders:
  linux_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/6...)

[fs, 2015-06-02 18:43:13]

The CQ bit was checked by fs@opera.com

[commit-bot: I haz the power, 2015-06-02 18:44:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1147343003/20001

[commit-bot: I haz the power, 2015-06-02 19:56:38]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196340